Accounting machine



Filed June 5, 1934 6 Sheets-Sheet l Nov. 10, 1936. K. GELPKE ACCOUNTING MACHINE Filed June 5 1934 6 Sheets-Sheet 2 His Gttorneg Nov. 10, 1936. I K. GELPKE ACCOUNTING MACHINE Filed June 5, 1934 6 Sheets-Sheet I5 Snveutor Kurt Gelpk By W H Gttorneg Nov. 10, 1936. K. GELPKE ACCOUNTING MACHINE Filed June 5, 1934 6 Sheets-Sheet 4 Ihwentor- Kurt Gelpke His attorney NOV. 10, 1936. GELPKE 2,060,191

ACCOUNTING MACHINE Filed June 5, 1934 6 Sheets-Sheet 5 3 nnentor Kurt Gelpke Hi; (Ittotneg Nov. 10, 1936. K. GELPKE ACCOUNTING MACHINE Filed June 5, 1934 6 Sheets-Sheet 6 3nnentor Kurt Gelpke By W His Gttorneg Patented Nov. 10, 1936 PATENT OFFlCE ACCOUNTING MACHINE Kurt Gelpke, Berlin, Germany, assignor to The National Cash Register Company,

Dayton,

Ohio, a corporation of Maryland Application June 5, 1934, Serial No. 729,132 In Germany June 10, 1933 12 Claims. (Cl. 235-450) This invention relates to improvements in accounting machines of the type illustrated and described in Letters Patent of the United States No. 1,203,863 issued November '7, 1916- to Halcolm Ellis and United StatesPatent No. 1,819,084;

issued August 18, 1931 to Emil John Ens.

Accounting machines of the type disclosed in the above patents have an automatic overdraft feature that transposes the complement of an overdraft into a true or positive amount and prints this true amount in the proper column of 'a record sheet. In an overdraft operation the machine operates through three cycles of movement. In the first cycle the balance totalizer is cleared and the complement of the overdraft is simultaneously transferred to an auxiliary storage device. In the second cycle the complement is subtracted from the cleared balance totalizer and in the third cycle the balance totalizer is again cleared and the true amount of the overdraft is printed. During the first and second cycles of an overdraft operation the printing mechanism is disabled to prevent printing of the complement. The chief disadvantage of the above system is that there is no way to retain the amount of the overdraft in the machine at the completion of an overdraft operation and in case it is desirable to use the amount of the overdraft in further computations it is necessary to set this amount up on the keyboard and enter it in the desired totalizer or totalizers in the regular manner.

It can readily be seen that it is of decided advantage to be able to read or ascertain the amount of an overdraft and at the same time retain said overdraft in the machine for further computation.

It is therefore broadly an object of this invention to provide means to ascertain and preserve the true amount of an overdraft.

A more specific object is the provision of means to automatically transfer the amount of an overdraft to a particular totalizer during the clearing of the balance totalizer in overdraft operations.

Another object is to provide means to automatically select a totalizer for addition during the last cycle of an overdraft operation in which last cycle of operation the positive amount of the overdraft is cleared from the balance totalizer and recorded.

A further object is to provide means to control the automatic selecting means for the totalizer.

With these and incidental objects in view the invention includes certain novel features of construction and combination of parts, the essential elements of which are set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of said drawings:

Fig. l is a sectional view of the machine taken just to the right of an amount bank and depicts in general the totalizer and printer actuating mechanisms.

F 2 is a side elevation as observed from the right of the machine, depicting the overdraft key and associated mechanism that controls the operation of the printing mechanism in overdraft operations.

Fig. 3 is a perspective view of the overdraft key and associated mechanism that controls the functions of the balance totalizer in overdraft operations.

Fig. 4 is a side elevation as observed from the right of the machine illustrating the mechanism for automatically selecting the overdraft storage totalizer in overdraft operations.

Fig. 5 is a fragmentary view of a part of the selecting mechanism for the overdraft storage totalizer.

Fig. 6 is a view showing the subtract control operating mechanism.

Fig. '7 is a view of the automatic controlling mechanism for the overdraft-totalizer.

Fig. 8 is a detail view of the totalizer engaging cam. Y Fig. 9 is a view illustrating the overdraft control key and some of the mechanism controlled thereby.

, Fig. 10 illustrates the means to drive the overdraft mechanism cam line.

Fig. 11 is a detail view of the overdraft cam line drive mechanism.

Fig. 12 is a perspective view of the auxiliary differential mechanism.

Fig. 13 shows the auxiliary differential engaging means.

Fig. '14 is a detail of the auxiliary-differential engaging cam.

Fig. 15 shows the zero stop for one of the auxiliary differential wheels.

Fig. 16 is a disunited perspective View of the overdraft cam line.

Fig. 1'7 illustrates how the overdraft key releases the machine for operation.

Fig. 18 is a side view of the cam line shown in Fig. 16.

' Fig. 19 is a detail view of the No. 2 totalizer engaging mechanism.

GENERAL Dascmr'rron The machine in which the instant invention is incorporated has an automatic overdraft feature that transposes the complementary amount of an overdraft into a positive amount and records this positive amount upon suitable record matestorage totalizer reserved solely for this purpose.

Next this complementary amount is subtracted from the clear balance totalizer which results in' the true amount of the overdraft remaining in the balance totalizer. overdraft operation a total is taken from the addsubtract or balance totalizer and the true amount of the overdraft issimultaneously printed upon the record material. In order to prevent printing the negative amount of the overdraft, depressing the overdraft key disables the printing mechanism which remains disabled during the first two cycles of an overdraft operation and consequently functions only during the last cycle of an overdraft operation.

In order to retain the overdraft in the machine for further computation mechanism has been devised which in the third cycle of an overdraft operation selects a particular totalizer for addition. Consequently the true or positive amount of the overdraft is added in the particular totalizer'during the final clearing of the balance totallzer. In a subsequent machine operation this amount may be subtractively entered in the balance totalizer thereby placing said totalizer in its originaloverdrawn condition. This permits a sub-totaltaking and recording 'of the amount of the overdraft which is the desired result and which prior to this invention was not obtainable in machines of this type. Dsrsrmn Dssosrr'non Machine operating mechanism The mechanism of the instant machine is supported by two main frames, at right frame 23 and a left frame 33 (Figs. 1 and 2). The main frames are secured on a machine base (not shown) and are connected and braced by various cross frames. The mechanism of the machine is enclosed in a suitable case or cabinet 3| (Fig. 4) which also supports a laterally shlftable traveling carriage 23 (Fig.15) similar to that used on typewriters, with a platen roll 32 (Fig. 1) adapted to support record material in proper relation to the printing mechanism. If desired the machine may be equipped with typewriter attachment for the en'- tering of items and various other data upon the record material.

The usual constantly running electric motor is used to drive the mechanism of the machine to which it is operatively connected by means of a clutch mechanism consisting of a driving and a 33 (Fig. 1) rotatably supported by the main In the final cycle of an frames. The arm 34 carries a stud 33 which is normally engaged by. a notch in a connecting link 43 the upper end of which is pivoted to the flexible portion of an arm 4| secured on a printer drive shaft 42 rotatably supported by the right machine frame 29 and the printer side plates. In a manner later to be described, depressing the overdraft key causes the link 40 to be shifted counterclockwise to disengage the notch therein from the stud 33 and to latch a notch 43 therein over a stationary stud 44 secured in the right machine frame. The link 40 remains thus disengaged from its driving arm 34 during the first two cycles of an overdraft operation and consequently in these two cycles the printing mechanism does not function. At the beginning of the third cycle of an overdraft operation the link 43 is shifted back into engagement with the stud 33 so that the arm 34 will operate the printing mechanism to print the true amount of the overdraft.

Releasing the machine for operation connects the clutch driven member to the clutch driving member. This by means of the link 33 (Fig. 2) rocks the arm 34 first counterclockwise and then back to normal position as here shown through an approximate angle of sixty degrees. when the link 43 is connected to the stud 33 the excursion of movement of the arm 34'is transmitted to the printer shaft 42 rocking said shaft and the arm 4| first clockwise and then back to normal position. Movement of the arm 34 causes the roller 33, in cooperation with the camming slot in the plate 31 to rock the leading frame shaft 33 (Fig. 1) first counterclockwise and then back to normal position.

Keyboard and totalizer actuating mechanism Directing attention to Fig. l, the machine of this invention has a plurality of rows of. denominational amount keys 45 (only one row here shown) the upper ends of which protrude through openings in a keyboard top plate 43, supported by various keyboard side plates. Each key 43 is urged upwardly by a compression spring 41 and each key likewise carries a square stud 43 adapted to cooperate with graduated steps 43 on the forward end of an actuator rack 53 supported for horizontal reciprocating movement by bars II and 52 in turn fixedly supported by the main frames of the machine. Secured to the rearwardly disposed end of the rack 50 is an extension rack 53 the bifurcated portion of which embraces a rod 54 supported by a rear totalizer frame 33..

ments 33. The segment 38 has an arm 33 connected by a link 63 to a printing segment 3| pivoted to an arm 32 loose on the shaft 42 and having associated therewith an anti-rebound plate 33. The anti-rebound plate 33 has two projections which cooperate respectively with a printer release trigger 34 and a zero elimination pawl ll both of which are rotatably supported between the side plates of the printer mechanism. A tall 33 of the pawl 35 has an arcuate surface which cooperates with a stud 31 carried by a forwardly extending arm of the segment 53. r

A spring 33 (Fig. 1) stretched between the segment 53 and a cross bar 39 of a leading frame I3 secured on the shaft 33 urges a projection of said segment into contact with the forward edge of the leading frame bar 33. The racks 33 are normally maintained in zero position by means of a zero stop lever (not shown). Depressing one of the amount keys 45 rocks the zero stop lever for that particular denomination to ineffective position and moves the stud 48 for the key depressed downwardly into the path of its associated step 49 on the rack 58.

Upon release of the machine for operation the leading frame 18 starts its initial movement counterclockwise in unisonwith the shaft 38. The spring 88 causes the segment 58 and the actuator rack 58 to follow rearwardly in unison with the leading frame 10 until the proper step contacts the stud 48 of the depressed amount key. This differentially positions the rack 58 and the segment 58 commensurate with the depressed amount key and the segment 58 by means of the link 68 positions the printing segment- 6| correspondingly. After the rack 58 has thus been positioned the leading frame 18 continues to move counterclockwise independently of the segment 58 flexing the spring 88. Movement of the rack 58 and the segment 58 out of zero position causes the stud 61 incooperation with the arcuate surface of. the tail 86 to rock the zero elimination pawl 85 counterclockwise against the tension of a spring II. This disengages the pawl 65 from the projection of the anti-rebound plate 63. When the leading frame In reaches the end of its initial movement counter clockwise an alining bar 12 is moved upwardly into engagement with teeth of the segment 58 to aline said segment and the printing segment Blwhile an impression is being made. Immediately thereafter the printer release trigger 64 is rocked counterclockwise out of engagement with the projection of the plate 63, thus releasing said plate and the arm 82 to the action of. a spring 13. The spring 13 carries the plate 63, the arm 82 and the printing segment 6| clockwise until said segment engages first an inking ribbon and moves it into contact with record material wound around the platen roll 32 to imprint the value of the depressed key on the record material.

Immediately after the impression is made the aliner 12 (Fig. 1) is disengaged from the segment 58 and the leading frame 18 starts its return movement clockwise, picking up the segments 58 and their associated racks 58 and carrying them back to zero position. x

The mechanism illustrated in Fig. 1 and just described 'is for one denominational unit of the machine and as this mechanism is duplicated in the other denominational units it is thought unnecessary to illustrate or describe more than the one unit.

Totalizers .main frames and the two rear totalizers are supported in the framework 55, which is connected bya pair of side plates, only one 15 being here shown, to the front totalizer frame 14. The upper front or No. 1 totalizer is a balance or addsubtract totalizer and has aplurality of wheels 16, one for each denominational order, which cooperate with the upper set of teeth of the actuator racks 50. The lowerfront or No. 2 totalizer has a series of wheels which cooperate with the lower set of teeth on the racks 58. The upper rear or No. 3 totalizer and the lower rear or No. 4 totalizer have respectively denominational wheels 8| and 82 cooperating with the teeth of the extension racks 53. In the instant machine the Nos. 2, 3 and 4 totalizers are adding totalizers.

In adding operations after the racks 58 and the segments 58 have been positioned by the depressed amount keys and the leading frame ID has completed its initial movement counterclockwise the wheels of the selected totalizer or totalizers are rocked into engagement with the teeth. of the racks 58 or the extensions 53. Return movement of the leading frame 18, the segments 58 and the racks 58 rotates the wheels of the engaged totalizer or totalizers commensurate with the value of the depressed amount keys. In subtract operations the wheels of the No. l or balance totalizer are engaged with the racks 58 prior to their initial movement rearwardly.

} Consequently their initial movement rotates the Wheels 16 of the balance totalizer in a reverse direction commensurate with the value of the depressed amount keys. The usual transfer mechanism is employed to transfer amounts from lower to higher denominations.

In total taking operations the wheels of the selected totalizer are engaged with the racks 58 or their extensions'53 prior to their initial movement rearwardly, which movement rotates the wheels of the selected totalizer reversely until the transfer tripping segments carried by individual wheels, engage their respective tripping pawls, which due to reverse rotation of the totalizer wheels are not tripped thereby but act as stops to locate the totalizer wheels in zero position and to position the racks 50, the segments 58 and the printing segments 6i commensurate with the amounts standing on said totalizer wheels. If the operation being performed is a sub-total taking operation the wheels of the selected totalizer remain in engagement with the racks 58 or their extensions 53, as the case may be, and return movement forwardly of said racks rotates said totalizer wheels back to their original positions. If the operation being performed is a total taking operation, after the wheels of the selected totalizer have been returned to zero to trol keys (two of which are shown) located on the lefthand side of the keyboard. Likewise the adding function of the different totalizers is controlled by means of the traveling carriage in tabulated columnar positions thereof in the following manner:

The traveling carriage 28 carries a tabulating stop bar 83 (Fig. 5) upon which is adjustably located a plurality of tabulating stops 84. When the traveling carriage is tabulated to a particular column, a camming lug 85 of the stop 84 engages an upward extension 86 of a hanging bar lever 81 pivoted at 88 to a cross frame 89 and rocks said lever 81 clockwise as here viewed to lift the hanging bar 98 to select and condition one of the totalizers for an adding operation.

A hanging bar 4lll (Fig. 7) connects a hanging bar lever similar to the hanging bar lever 81 to a controlling latch 402 pivoted to the left machine frame 30 to rock said latch counter-clockwise to release an add controlling crank 483 (Fig. 7) to condition the No. 1 totalizer for an add operation. Thecontrolling crank 403'is restored to normal position near the end of each machine operation by a nose 404 on an operating plate 445 secured to the shaft 399 contacting and rocking clockwise a lever 406. A pitman 401 is pivoted to the lever 406, its upper end being bifurcated to embrace a stud 40B fast in the controlling crank 403. Thus, the clockwise rocking of the lever 400v also rocks the controlling crank 403 clockwise until the latch 402 under spring tenslon reengages said controlling crank 403 to retain it in home position. U

The No. 1 totalizer may be conditioned for subtract operations either by depression of the subtract key 390 (Fig. 6) or by arranging stops on the tabulating stop bar 03 (Fig. 5). Referring to Fig. 6, the subtract key 398 has therein a notch 400 adapted to receive an ear 0 bent on a latch 4H. pivoted on a stud 4i2 carried by the left machine frame 30. A projection 4| 3 on the latch 4H cooperates with a stud 4 fast in a toggle lever 5 also pivoted on the stud 4l2. Pivoted on the lever H5 is an arm 6 having an open-ended slot through which extends a stud "1 fast in a lever 4l3 (Fig. 6) pivoted on a stud 9 fast in 'the frame 30.

A pair of flexibly mounted pawls 420 and 42! carried by the lever 4IB are arranged to cooperate with the lower end of a flying lever 422 pivoted on a stud 423 carried by the operating plate 405. A link 424 pivotally connects the lever 422 to a crank 425 secured to a shaft 425 journaled in a pair of totalizer frames 14 (Fig. l). Secured on the shaft 426 is a pair of cams 421 (Fig. 8)

adapted to cooperate with rollers 428, one being loosely assembled on each end of the No. 1 totalizer shaft 438. Two arms 439, one only here shown, connected by a bail 439 and pivoted on a pair of studs 430 secured in the totalizer frames forms a rockable frame for supporting the addsubtract totalizer shaft 426.

A link 43i (Fig. 6) pivotally connects the lever 4i! to another lever 432 pivoted at 433 to the left machine frame. Fast in an arm of the lever 432 is a stud 434 arranged to cooperate with the lower edge of a shift bar operating latch 435. The latch 435 is flexibly connected to an arm 436 pivoted to a bell crank 431 secured to a shift bar shaft 440 journaled in the totalizer frames.

Depression of the subtract key 398 causes the latch 4H and lever 5 under tension of a spring 44lto rock clockwise, thus rocking the levers H5 and H8 clockwise to place the pawls 420 and 42! .in the path of the flying lever422. Contact of the flying lever 422 with thepawl 42l, caused by the initial movement clockwise of the operating plate 405, through the link-424 (Figs. 6, '7 and 8) and crank 425, turns the shaft 426 and cams 421 counter-clockwise to properly engage the No. 1 totalizer wheels with the actuator racks 50 for a subtract operation. The rocking of the lever 4H5 (Fig. 6) also displaces the stud 434, allowing the latch 435' to drop into position to be drawn forwardly by the stud 448 to set the transfer mechanism for a subtract operation in the usual manner. The return or counter-clockwise movement of the operating plate 405 causes the flying lever 422 to engage the pawl 420 torock the shaft 420 and cams 421 clockwise to disengage the No. 1 totalizers from the actuator racks.

No. 2 totalizer engaging mechanism Fig. 19 illustrates the mechanism for engaging the wheels of the No. 2 totalizer with the actuator rack and also the mechanism which cooperates with the traveling carriage to condition the No. 2 totalizer for add operations. As this mechanism is of conventional design it will be treated briefly in the following description. Connected by the hanging bar 01 (Figs. 4, 5 and 19) to the hanging bar lever 90 is a controlling latch 408 which is arranged to cooperate with a controlling crank 481 to cause the No. 2 totalizer to be engaged with and disengaged from the actuator racks 50 at the proper time during an add operation in 'the same manner as the mechanism for the No. l totalizer, which was explained in the preceding description. Either the No. 2, 3 or 4 totalizer can be controlled by a hanging lever to receive the negative balances. The No. 2 totalizer has been used herein for illustration only.

Overdraft mechanism Embodied in the instant machine is mechanism to cause three continuous cycles of operations to transpose the complementary or negative "amount of an overdraft into a positive or true amount and print said true amount on record material wound around the platen roll. This mechanism is shown in the application for Letters Patent of the United States, filed April 14, 1932, by Charles L. Lee, Serial No. 605,160, and so much of that mechanism as is necessary to understand the instant invention will now be described.

In the present machine the occurring of an overdraft automatically unlocks the overdraft key I04, which is normally locked against depression. If the operator wishes to ascertain the amount of an overdraft, all that is necessary is the depression of this key. Depression of the overdraft key I04 releases the machine for an overdraft operation, consisting of three cycles,

. and likewise causes the printing mechanism to be disabled during the first two cycles of operation. It also causes the auxiliary differential to be engaged with and disengaged from the actuator racks at the proper time and conditions the No. l totalizer for a total taking operation during the first cycle of operation, a subtract operation during the second cycle, and finally a second total taking operation during the third cycle of operation. The first cycle of an overdraft operation causes the total of the No. 1 totalizer, which total is the complement of theoverdraft, to be temporarily added into the auxiliary differential and to be cleared from the No. 1 totalizer. During the second cycle this complement is subtracted from the cleared No. 1 totalizer, leaving the positive amount of the overdraft in the No. 1 totalizer and clearing the auxiliary differential. The final or third cycle of an overdraft operation takes a total from the No. 1 totalizer and prints this interposed between the platen roll and the printing type. The overdraft mechanism is treated in detail in the following description.

Overdraft cam line driving mechanism thereto only when the overdraft key is depressed. This overdraft cam driving mechanism will now be explained.

A stud 203 (Fig. 10) in the overdraft key 104 extends through a slot in a latch 204 pivoted to an arm 205 fast on the shaft 35. A notch 206 in the latch 204 is arranged to latch over a stud 20'1 fast in a reciprocable pitman 208 which is bifurcated on its right end to embrace an undercut portion of a slotted bushing 209 fast on the shaft 35. The left end of the pitman 208 is also bifurcated to embrace a slotted portion of a bushing 210 loosely mounted on a stud 2| 1 carried by the frame 29. Pivotally mounted on the pitman 208 is a pair of pawls 212 and 213 (Fig. 11) eachpawl having secured therein a stud 214 which extends through one of the holes in the pitman. These holes are of correct size to properly limit the travel" of the pawls 212 and 213, and form stops against which the studs 214 are held by a spring 215. The pawls 212 and 213 are adapted to cooperate with a three-toothed feed ratchet 216 (Figs. 10, 11 and 16) keyed to a hub 9'1 journaled on the stud 21 1. Also keyed to the hub 9'1 is a six-tooth retaining ratchet 218 adapted to cooperate with a retaining pawl 219 (Fig. 10) pivoted on a stud 220. A locking pawl 221 (Fig. 10) pivoted on the stud 105 has therein a stud 222 adapted to cooperate with a projection 223 on the overdraft key 104. An arcuate surface 224 on the pawl 221 is arranged to coact with a stud 225 carried by the retaining pawl 219. A spring 226 stretched between-the pawls 219 and. 221 holds the pawl 219 in contact with the teeth of the ratchet 218 and also normally holds the pawl 221 in a position where the arouate surface 224 will be opposite the stud 225 thus locking the pawl 219 between two teeth of the ratchet 218 to prevent movement of the hub 9'1 at all times except during overdraft operations.

Depression of the overdraft key 104 (Fig. 10) rocks the pawl 221 counter-clockwise to release the retaining pawl 219 and causes the notch 206 in the latch 204 to engage the stud 201. The arm 34 oscillates through an approximate angle of 60 degrees each time the machine'is operated. During an overdraft operation, inasmuch as the machine makes three operations, the arm 34 will make three oscillations. The first movement counter-clockwise of the arm 34 (Fig. 10) will through the arm 205 and latch 204 slide the pitman 208 to the left causing the pawl 212 (Fig. 11) to rotate the ratchet 216, hub 91 andcam assembly keyed thereto one-sixth of a revolution counter-clockwise, or one tooth space on the ratchet 218. The return movement clockwise of the arm 34 returns the pitman 208 to its home position, causing the pawl 213 to engage another tooth of the feed ratchet 216 to rotate the hub 9'1 another one-sixth revolution. The feed pawls 212 and 213 have projections 221 and 228, respectively, which cooperate with the feed ratchet 216 to prevent overthrow during fast operations.

Therefore, during the three cycles of an over- .draft operation the cam assembly on the hub 9'1 will make one complete revolution in -a counter-clockwise direction.

Add-subtract totalizer controlling mechanism Whenan overdraft occurs in the No. 1 addsubtract totalizer the complement of the overdraft remains upon the totalizer wheels. In an overdraft operation the object is to print the amount of this overdraft in positive form, and to do this, as previously explained, requires three cycles of the machine. During the first cycle of an overdraft operation the No. 1 totalizer is automatically cleared and the complement of the overdraft simultaneously added into an auxiliary storage differential. In the second cycle, this complement is subtracted from the cleared No. 1 totalizer leaving the positive amount of the overdraft standing in the No. 1 totalizer. In the third and last cycle of an overdraft operation a total is taken from the No. 1 totalizer and this total simultaneously printed upon a statement or record sheet. The mechanism that controls the No. 1 add-subtract totalizer during an overdraft operation is well illustrated in Figs. 2, 3, 7, and 16,.and will now be explained in detail.

Referring to Fig. 2, the link 40 has pivoted thereto the rearward end of a bar 91, the forward end of which is slotted to embrace a stud 92 in a cam arm 93 loose on a stud 94 in the right machine frame 29. The arm 93 carries a roller 95 adapted to cooperate with the periphery of a plate cam 96 secured on a bushing 91 loose on a stud 98 fast in the right machine frame. When the machine is at rest the arm 93 is maintained in normal position by means of a pawl 99 loose on a stud 100 in the right machine frame, said pawl being resiliently urged clockwise into engagement with a right-angled ear 101 of said arm 93. The pawl 99 carries a stud 102 which extends within a slot in the lower end of a link 103 the upper end of which is pivoted to an overdraft key 104 the upper end of which extends through a slot in the righthand side of the keyboard plate 46 and the lower end being bifurcated to embrace a stud 105 secured in the right machine frame. A spring 106 urges the overdraft key 104 upwardly to normally maintain a shoulder 10'1 thereof in contact with the lower surface of the keyboard plate.

Depressing the overdraft key 104 releases the machine for operation by link 380 (Fig. 17) acting on lever 383 in the usual and well known manner, and by means of the link 103 (Fig. 2) rocks the pawl 99 counterclockwise to disengage its tooth from the car 101 to release the arm 93 to the action of a, spring 108 which urges said arm clockwise until the roller 95 engages the lowest portion of the periphery of the cam 96. This by means of the bar 91 rocks the link 40 counter-' clockwise to disengage the notch therein from .the stud 39 carried by the drive arm 34 and to engage the notch 43 with the fixed stud 44. In the course of an overdraft operation the cam 96 makes one complete counterclockwise revolution. Near the end of the second cycle of an overdraft operation the cam 96 in cooperation with the roller 95 rocks the arm 93' counterclockwise to its normal position as shown in Fig. 2 which by means of the bar 91 returns the link 40 into engagement with the stud 39. Thus it is evident that the shaft 42 which actuates the printing mechanism operates only during the last cycle of an overdraft operation. A spring 109 tensioned between the arm 93 and the bar 91 forms a flexible coupling between these two members and insures proper engagement of the link 40 with the stud 39. Near the end of an overdraft operation the overdraft key 104 is released and returned upwardly allowing the tooth of the pawl 99 to engage the ear 101 to retain the arm 93 in its normal position when the highesta gortion of the cam 96 passes beyond the roller Directing attention to Fig. 3, the overdraft key 104 has pivoted thereto one end of a link 121 the other end of which is slotted to embrace a stud in a pawl I28 loose on the stud I00. The pawl I28 is notched to receive a projecting ear I I of an arm III, loose on the stud 94 said arm supporting a roller I I2 which cooperates with the periphery of a plate cam I I3 secured on the bushing 91 rotatably supported by the stud 98. The arm I I I is connected by a link II4 to a bell crank I I5 secured on a shaft II6 opposite ends of which are journaled in the main machine frames 29 and 30. Secured on the lefthand end of the shaft H6 is a total taking control arm III (see also Figs. 4 and 7) carrying a stud II8 which extends within a slot H9 in an arm I fulcrumed on a stationary stud I2I in the left frame 30. The lower end of the arm I20 cooperates with a stud I22 in a plate I23 mounted for horizontal sliding movement by means of studs I24 secured in the left frame and extending through parallel slots in said plate I23.

A link I25 connects the plate I23 to a crank I26 secured on a symbol segment positioning shaft I30 journaled in the main machine frames. The link I25 carries a stud I3I which cooperates with the lower end of a lever I32 rotatably supported by a fixed stud I33 secured in the left machine frame 30. The upper end of the lever I32 is bifurcated to embrace a stud I34 in a slide I35 having parallel slots through which extend studs I36 secured in the left machine frame. Pivoted at I31 to the slide I35 is an arm I38 with a projection I39 which normally engages the edge of a bent-over portion of the slide I35. Pivoted at I40 to the arm I38 is a flexible member I4I with a projecting ear I42 that is maintained in contact with the upper edge of the arm I38 by means of a torsion spring I43 opposite ends of which engage respectively the arm I38 and the member MI. The upper horizontal edge of the member MI is arranged to cooperate with a stud I44 in the hanging bar 90 (see also Fig. 5). The arm I38 has a projection I45 which cooperates with a stud I46 in a link I41 the lower end of which is connected to a crank I 48 secured on a shaft I49 journaled in the main frames 29 and 30. The upper end of the link I4! is connected to one arm of a bell crank I50 loose on a stud I5I secured in the left frame 30. Referring to Fig. 2, secured on the righthand end of the shaft I49 is an arm I52 with a projection I53 which cooperates with a stud I54 in the arm M. A link I55 pivotally connects the arm I52 to a bell crank I56 similar to the bell crank I50 (Fig. 4), said bell crank I56 being loose on a stud I51 secured in the right machine frame. Springs I58 and I59 attached respectively to the arms I56 and I50 urge said arms clockwise as viewed in Fig. 2 and counterclockwise as viewed in Fig. 4 to normally maintain the projection I53 of the arm I52 in contact with the stud I54.

Depression of the overdraft key I04 (Fig. 3) by means of the link I21 rocks the pawl I28 counterclockwise to free the arm III to the action of a spring I60, one end of which is attached to the bell crank H5. The spring I60 urges the shaft H6 and the arm III clockwise until the roller I I2 engages a low portion of the periphery of the cam II3. This movement of the shaft I I6, which as observed in Fig. 5 is counterclockwise, rocks the arm II! in unison therewith causing the stud II 8 in cooperation with the slot II9 to rock the arm I 20 also in a counterclockwise direction. The lower end of the arm I20 in cooperation with the stud I22 moves the plate I23 forwardly which by means of the link I25 and the stud I3I rocks the lever I 32 in a counterclockwise direction against the action of a spring I29 which maintains the lever I 32 and associated mechanism in normal ineffective position as shown in Fig. 4. The lever I32 moves the slide I35 rearwardly to move the projection I45 of the arm I38 into the path of the stud I46 carried by the link I41. However due to the fact that the link 40 (Fig. 2) is disconnected from the drive arm 34 In the manner explained earlier herein the arms H and I52, the shaft I49 and the crank I48 (Fig. 4) remain stationary during the first two cycles of operation of an overdraft operation. Consequently the stud I46 imparts no rocking movement to the arm I38 during the first two cycles of an overdraft operation. During the second cycle of an overdraft operation a high portion IBI of the cam II3 rocks the arm III and connected mechanism back to the position shown in Fig. 3. However due to the fact that the overdraft key I04 is retained depressed the pawl I28 is thereby prevented from reengaging the ear H0 and the roller II2 remains in contact with the periphery of said cam I I3.

At the beginning of the third cycle of an overdraft operation another low portion I62 of the cam II3 moves opposite the roller II2 consequently the spring I60 returns the arm III, shaft H6 and arm III counterclockwise, as viewed in Fig. 5, to cause the stud II8 to move the arm I20 and connected mechanism to effective position as described above. This moves the projection I45 of the arm I38 in the path of the stud I49 and as it will be recalled by referring to Fig. 2 that the link 40 is re-engaged with the stud 39 at the beginning of the third cycle of an overdraft operation the arm 34 in its initial counterclockwise movement rocks the arm 4I clockwise which movement by means of the stud I54 is transmitted to the arm I52 to rock the shaft I49 counterclockwise, as viewed in Fig. 2, and clockwise as yiewed in Fig. 4. This by means of the crank I48 moves the link I" and the stud I49 downwardly to rock the arm I38 counterclockwise to cause the member I4I to engage the stud I44 to lift the hanging bar 90 to select and condition a particular totalizer for an adding operation.

A flexibly mounted latch 285 (Fig. 7) pivoted on the stud I2I has an ear 286 arranged to cooperate with a notch 28'! in the No. 1 total key 85. A leg 290 of the latch 285 cooperates with an ear 29I on the latch arm I20. In the lower end of the arm I20 is a stud 292 adapted to engage a total cam lever 293 loosely mounted on the stud M9 and adapted to contact a stud 294 carried by the lever 4I8.

Depression of the overdraft key I04 (Fig. 3) disengages the detent I28 from the cam arm III allowing said arm III. the arm II5, shaft II6, arm 263 (Fig. 6) and lever II! to rotate clockwise, as viewed in Fig. 3, under tension of a spring I60 until the roller I I2 on the cam arm I I I strikes the lowest part of the periphery of the cam H3. The above described movement of the lever III is counter-clockwise as viewed in Fig. 7, which causes the V-shaped'arm III, through the stud II8, to force the latch arm I20 clockwise independent of the latch 285.

As the arm I20 moves clockwise the stud 292 rocks the cam lever 293 and its associated lever 4I8 clockwise which places the pawls 420 and 42I in the path of the flying lever 422 so that the No. 1 totalizer will be engaged with the racks 50 and will be cleared during the first cycle of an The above movement of the arm the No. 1 totalizer is transferred to an auxiliary differential to be later described. Such amount represents the complement of the true overdraft. After such clearing of the No. 1 totalizer it is disengaged from the racks 50 duringsaid first cycle.

I20 is independent of the latch 285 and in no way affects the total key 85. Also, when the shaft H6 and arm 263 rock during total taking operations, the stud 289 (Fig. 6) moves idly in the slot in the link 204, and therefore does not disturb the lever I90.

clockwise to its home or neutral position near the end of the first cycle of an overdraft operation. At the beginning of the second cycle of an overdraft operation the highest surface I6I of the cam H3 forces the arm I I I counter-clockwise beyond its neutral position, causing the arm 263 through the link 264 to rock the lever I90 counter-clockwise as viewed in Fig. 3, and clockwise as viewed in Fig. 6. This rocks the toggle lever I I (Fig. clockwise to condition the No. 1 totalizer for a subtract operation in the second cycle of an overdraft operation. During this subtract operation the complement of the true overdraft on the hereinafter described auxiliary differential is subtracted from the cleared No. 1 totalizer leav ing the latter with the amount of the true overdraft therein.

Near the end of the second cycle the cam H3, in the manner previously described, allows the arm II I and connected parts to be positioned by the spring I60 for another total taking operation so that during the third cycle the true amount of the overdraft is cleared from the No. 1 totalizer. Near the end of the third cycle of operation a raised portion I96 (Fig. 16) of the cam II3 restores the arm III and connected parts to their home or neutral positions, and the simultaneous restoration of the overdraft key I04 in a manner to be later described, releases the detent I28, which then re-engages the ear III] to retain the arm III and parts connected thereto in their home positions, while the cam 3 travels on to its home position, as shown in Fig. 3.

Auxiliary dz'fierential In previous Ellis machines, in order to print the amount of an overdraft positively it was necessary for the operator to transfer the complement of the overdraft from the add-subtract totalizer to one of the straight adding totalizers which had previously been cleared. This necessitated the tying up of a totalizer that possibly could have been used to advantage forpther purposes. To overcome this condition an auxiliary differential was devised. for the present machine into which the complement of an overdraft is temporarily stored during part of an overdraft operation.

A detailed description will now be given of the auxiliary differential mechanism.

A frame 300 (Figs. 1, 12 and 13) is formed by an angle bar 30I, having thereon a pair of arms 302 and 303 bent at right angles thereto. The frame 300 is pivoted on a rod 5I which extends through the machine-and is rigidly supported in the main frames 29 and 30. Attached to the angle bar 30I is a plurality of brackets 305 having pivoted thereon a series of wheels 306, each having a wide tooth 301 (see also Fig. 15) adapted to cooperate with a projection'308 bent on said brackets 305. The extreme righthand Wheel 306 (Fig. 12) is pivoted .on the arm 303 having a projec- 3I5 in constant contact-with the cam 3I4.

tion 309 which is in the path of the wide tooth 301. Normally the wide teeth of the wheels 306 rest against the projections 308 and 309 in which positions they are held by an alining bar 3H0 held in cooperative relation with said wheels by a pair of springs 3| I, (only one here shown in Fig. 13)

I The lining bar 3 I 0 is pivoted within the frame 300 by means of a pair of arms 3I2 and 3I3 formed thereon.

Keyed to the hub 91 (Figs. 14 and 16) is an engaging cam 3M, the periphery of which is adapted to co-act with a roller 3I5 (Fig. 14) carried by an arm 3I6 secured to the shaft 99. Also secured to the shaft 09 is a pair of arms 31% (Fig. 13), each having therein a cam slot 359 adapted to cooperate with studs 320 fast in the arms 302 and 303 of the frame 300. A pair of springs 32f (only one shown) are tensioned to hold the roller in the arms 3I2 and 3I3 are studs 313 and 314 which extend through concentric slots in the arms 302 and 303 of the frame 300 and are adaptedto be engaged by the cam arms 3I8.

As previously explained, in the first cycle of an overdraft operation a total (complement of the overdraft) is taken from the No. 1 totalizer at the beginning of which operation the totalizer wheels 16 are meshed with the actuator racks 50. The initial movement rearward of the actuator racks revolve said wheels 16 until stopped by one of two long teeth thereon coming in contact with its trip pawl I91. This positions the actuators 50 and printing segments 6I commensurate with the amount standing on the totalizer Wheels, which in the case of an'overdraft is the compement thereof. While the actuators are thus positioned, the cam 3I4 (Figs. 14 and 16) rocks the arm 3I6, shaft 94 and arms 3I8 counter-clockwise. The cam slots 3I9 co-acting with the studs 320 rock the frame 300 counter-clockwise to mesh the wheels 306 witha series of rack bars 322 (Fig. 1) one of which is carried by each actuator rack 50. The arms 3I8 in their initial movement counterclockwise engage the studs 313 and 314 to rock the aliner 3l0 out of mesh with the wheels 306 after said wheels have been meshed with the rack bars 322. During the last half of the first cycle of an overdraft operation the actuators are returned to their forward positions, rotating the wheels 306 counter-clockwise to positions corresponding to that of the actuators 50.

In the second cycle of an overdraft operation the complement 'ofjthe overdraft which has been temporarily stored in the auxiliary differential is subtracted from the No. 1 totalizer, which was reset to zero in the preceding total taking operation. This is accomplished in the following manner.

In subtract operations the totalizer wheels 16 (Fig. 1) are meshed with the actuator racks 50 prior to the initial movement of said racks, the same as in total taking operations. The actuator racks in their initial movement rearward r0- tate the totalizer wheels and the wheels 306 of the auxiliary differential until the wide teeth 301 on said wheels contact the projections 398 and 309. Thus the actuators are returned to the positions they were placed in by the total taking operation in the first cycle, causing the complement of the overdraftto be subtracted from the previousy cleared No. 1 totalizer, which leaves the positive amount of the overdraft therein.

Before the actuators 50 start their movement forward in the last half of the second cycle of an overdraft operation, the wheels 306 of the Fast . tion.

It will be seen from the foregoing description that when a total is taken of the No. 1 totalizer in the third cycle of an overdraft operation the amount of the overdraft will be printed in positive form, which is the desired result.

It will be remembered that in the third cyle of an overdraft operation the positive or true amount of the overdraft is cleared from the balance totalizer and simultaneously printed on the record slip and as a particular one of the adding totalizers has been selected for an adding operation the true amount of the overdraft will be transferred thereto. This allows the true amount of the overdraft to be retained in the machine and all that is necessary in order to restore the balance totalizer to its original condition is to select and condition said balance totalizer for a subtracting operation and select and condition the particular adding totalizer in which the true amount of the overdraft is stored for a total taking operation. Operation of the machine then causes the true amount of the overdraft to be subtracted from the clear, balance totalizer resulting in the reentering of the negative amount of the overdraft in the balance totalizer.

An on-and-oif mechanism is provided to control the automatic adding feature in the particular totalizer during the third cycle of an overdraft operation. This mechanism is illustrated in Figs. 4 and 5, and includes a slide I83 'reciprocably mounted on the machine case 3| by means of screws I84 which extend throughparallel slots in said slide I83 and are threaded in the machine case. The slide I83 has a downwardly projecting foot I85 extending through an opening in the machine case and arranged to cooperate with'the horizontal upper edge of the member Ill. The slide I83 has a bent-over portion forming a finger piece I88 with an aperture I81 through which the letters N and S engraved upon the machine case are visible, depending upon the position of the slide I83. When the slide I83 is in its righthand position, as viewed in Fig. 5 so that the letter N is visible through the aperture I81 this indicates that the machine functions normally, that is the foot I88 of the slide obstructs upward movement of the member HI when the arm I38 is rocked counter-clockwise in the third cycle of an overdraft operation as previously explained. This prevents lifting of the hanging bar 88 consequently the particular totalizer is not selected for an adding operation and as a result the amount of the overdraft is not retained in the machine. Moving the slide I83 toward the left as viewed in Fig. 5 so that the letter S (meaning sub-total) is'visible through the aperture I81 therein moves the foot I85 out of the path of the flexible member Ill. Consequently said flexible member moves in unison with the arm I38 to select the particular totalizer for an adding operation in the manner explained above. A spring-pushed ball I88 (Fig. 4) is retained in a hole in the case 3| and cooperates with recesses in the slide I83 to retain said slide in either of its positions.

It is therefore obvious from the foregoing spec! fication that the mechanism of this invention makes it possible, in effect, to take a subtotal of an overdraft occurring in the balance totalizer.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention i to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms all coming within the scope of the claims which follow.

What is claimed is:

1. In a machine of the class described adapted to automatically operate thru three cycles in overdraft operations, the combination of mechanism for causing three continuous cycles of operation:

.a balance totalizer adapted to be cleared during the third cycle of an overdraft operation; an overdraft device to control operation of said mechanism and said machine in overdraft opera# tions; an adding totalizer; and-means effective,

.balance and re-enters this true negative balance in the add-subtract totalizer and the third cycle of which causes the add-subtract totaliler to be cleared to control the recording of the true negative balance; and means including a manipulative member and mechanism rendered ellective thereby to enable said overdraft means to condition the adding totalizer for an adding operation in the third cycle of an overdraft operation.

3. In a machine of the class described having printing mechanism and means to operate the printing mechanism, the combination of a balance totalizer; an adding totalizer; means to condition the adding totalizer for an adding operation; an overdraft mechanism adapted to cause the machine to operate through three cycles to transpose a complementary negative balance to a true negative balance; means to disable the printer operating means during the first and second cycles of an overdraft operation; and means operated by the printer operating means in the third cycle of an overdraft operation to render the adding totalizer conditioning means effective.

4. In a machine of the class described adapted to operate through three cycles in overdraft operations, the combination with printing mechanism and means to operate the printing mechanism; of a balance totalizer; an adding totalizer; means to selectand condition the adding totalizer for an adding operation; means to control the printer operating means during overdraft operation; means to'cause a complementary negative balance to be transposed and re-entered in the balance totalizer as a true negative balance during the first and second cycles of an overdraft operation and to select the balance totalizer for a clearing operation in the third mic of an overdraft operation; an overdraft control member; and means render eifective by the control member and operated by the printer operating means in the third cycle of an 78 overdraft operation to operate the adding totalizer selecting means to cause the true negative amount of an overdraft to be entered.

5. In a machine of the class described adapted to operate through three cycles to transpose the complementary amount of an overdraft into a true negative amount, the combination of an adding totalizer; a slidable member; a flexible element supported thereby; means to operate the flexible element during the third cycle of an overdraft operation; means effective only during overdraft operations to move the element into communication with the operating means; means whereby the element upon operation conditions the adding totalizer for an adding operation; and manipulative means to control the element.

6. In an accounting machine adapted to operate through three cycles in overdraft operations, the combination with printing mechanismv and means to operate the printing mechanism; of a totalizer; means to disable the printer operating mechanism during the first and second cycles of an overdraft operation; means to condition the totalizer for an adding operation; means operated by the printer operating means in the third cycle of an overdraft operation to move the conditioning means to effective position; and means effective only during overdraft operations to shift the moving means into operative alinement with the printer operating means.

'7. In a machine of the class described adapted to operate through three cycles in overdraft operations, the combination of a balance totalizer adapted to be cleared in the third cycle of an overdraft operation; another totalizer; means to condition the other totalizer for adding operations; means to operate the conditioning means; means to move the operating means for the conditioning means to effective position; and means effective only during the third cycle of an overdraft operation to drive the operating means to condition said other totalizer for addition so that the amount being cleared from the balance totalizer will be additively entered therein.

8. In an accounting machine having a balance totalizer and an overdraft mechanism operable through three continuous cycles to control printing of true negative totals from the balance totalizer, the combination of another totalizer, means to condition the other totalizer for addition, means including a shiftable member and an element pivoted thereto, moved to effective position by the overdraft mechanism, to operate the conditioning means, and means to drive the pivoted element whereby the other totalizer is conditioned to receive an entry of the true negative amount under control of the balance totalizer.

9. In a machine of the class described having a balance totalizer and adapted to operate through three cycles to transpose the complementary amount of an overdraft into a true negative amount, the combination of an adding totalizer, means for conditioning the adding totalizer for operation, an overdraft mechanism, means controlled by the overdraft mechanism for actuating the conditioning means during the third cycle of operation, and settable means for controlling the effectiveness of the actuating means on the conditioning means.

10. In a machine of the class described, the combination of an adding totalizer including a set of wheels, a balance totalizer comprising a single set of wheels, an overdraft mechanism to cause the machine to operate through a plurality of continuous cycles of operation and to control the printing of a true negative total from the balance totalizer, and means controlled by the overdraft mechanism for automatically transferring the true negative amount from the balance totalizer wheels to the adding totalizer wheels during the last of the plurality of cycles.

11. In a machine of the class described, the

combination of printing mechanism; differential actuating mechanism; a balance totalizer; an adding totalizer; an overdraft mechanism effective first to transpose the complementary amount of an overdraft in said balance totalizer to a true negative amount and to subsequently control the printing thereof; and means controlled by said overdraft mechanism and effective during the printing phase of an overdraft operation to cause a transfer of the true negative amount of the overdraft from the balance totalizer to the adding totalizer.

12. In a machine of the class described, the combination of a differential mechanism; a balance totalizer; a second totalizer; an overdraft mechanism effective to control the cycling of the machine to first transpose the complement of a negative total in said balance totalizer to a true negative total.and to set up said true negative total on said balance totalizer; and means controlled by sald overdraft mechanism operable to subsequently control the transfer of the true negative total from said balance totalizer to said second totalizer.

KURT GELPKE.

CERTIFICATE OF CORRECTIQH.

Patent No. 2,060,191. November 10, 1936.

KURT GELPKE.

It is hereby certified that error appears in the pririlted specification of the above numbered patent requiring correction as follows: Page '7, first column, line 1 before "the" insert the words overdraft operation. The a.- mount cleared from; page 8, first column, line 1, strike out "overdraft operation. The amount cleared from"; same page, second column, line 65-66, claim 4, for "operation" read operations; and line '73, same claim, for "render" road rendered; and that the said Letters Patent should be read with these correction: therein that the same may conform to the record of the case in the Patent Office Signed and sealed this 12th day of January, A. D. 1937.

HenryVan Arsdale (Seal) Acting Commissioner of Patents. 

